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Type A AT - 29 Feb 1988
Slimline 286, 386SX and 486; 486 EISA
Tandon Type A AT 29 Feb 1988

Code

Meaning

01

Test 80286 CPU flags and registers

02

Test BIOS ROM checksum

03

Test MC146818 CMOS RAM battery (RTC)

04

Test 8254 timer

05

8254 timer test failed

06

Initialize RAM refresh

07

Test first 16K RAM

08

Initialize cold boot interrupt vectors

09

Test 8259 interrupt controller and interrupt vectors

0A

Fill in temporary interrupt vectors

0B

Initialize interrupt vector table 1

0C

Initialize interrupt vector table 2

0D

Initialize fixed disk vector

0E

Interrupt vector test failed

0F

Clear keyboard controller input buffer

10

Keyboard controller input buffer clearing failed

11

Run keyboard controller self-test

12

Initialize equipment check data area

13

Determine presence of and install 80287 math coprocessor

14

Test MC146818 CMOS RAM disk value range

15

Test for and install parallel port

16

Test for and install serial port

17

Invoke INT 19 to boot operating system

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